search for papers and start to write the paper

Today, I started to search for papers so that I can rewrite the introduction. Also, I list some tasks added to the original work.

Summary:

I am now rewriting the introduction and search for useful papers when writing it.

Also, I listed two more tasks:
1. analyze sensitivity to noise in input data
2. analyze dependence of the accuracy on each of the inputs (rank all inputs using parallel computing)

Tomorrow, I will try to finish the two tasks and continue to write the paper.